Jerky video during playback

The software you use to play it as well as the codecs will make a difference.

Also, everything else on your computer will too. I have no problem playing back 1080P video on my 2 year old laptop, but I'm very picky about what sort of software I let run. For instance, I've gone through and disabled all non-essential services, as well as turned off the automatic update features for pretty much everything.

I use a piece of software called "Media Player Classic" to play back movies. It's lightweight and seems to have no issues with dropped frames.

It's not your camera - so don't worry. Even if you can't get your computer to play it back smoothly, you can rest assured that you have good quality original video.